Yes, thank you. Mandau is the way to go.
They weren't offered to me for sale, they were in his possession as his private collection, and he just showed them to me for fun.
Sabel Marechaussee was a good keyword. Found lots of pages via Google, among them several threads on Vikingsword
Klewang being the Indonesian name for it. Can we be sure it is a copy, judging solely from the two photos?
Edit/ Hehe, just noted somebody has written "DATU" (Malay honorific title) on the Mandau's hilt with a marker pen for whatever reason...